src/script/cpp_api/s_internal.h

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 /******************************************************************************/
  21 /******************************************************************************/
  22 /* WARNING!!!! do NOT add this header in any include file or any code file    */
  23 /*             not being a modapi file!!!!!!!!                                */
  24 /******************************************************************************/
  25 /******************************************************************************/
  26
  27 #ifndef S_INTERNAL_H_
  28 #define S_INTERNAL_H_
  29
  30 #include "common/c_internal.h"
  31 #include "cpp_api/s_base.h"
  32
  33 #ifdef SCRIPTAPI_LOCK_DEBUG
  34 #include "debug.h" // assert()
  35
  36 class LockChecker {
  37 public:
  38         LockChecker(int *recursion_counter, threadid_t *owning_thread)
  39         {
  40                 m_lock_recursion_counter = recursion_counter;
  41                 m_owning_thread          = owning_thread;
  42                 m_original_level         = *recursion_counter;
  43
  44                 if (*m_lock_recursion_counter > 0)
  45                         assert(thr_is_current_thread(*m_owning_thread));
  46                 else
  47                         *m_owning_thread = thr_get_current_thread_id();
  48
  49                 (*m_lock_recursion_counter)++;
  50         }
  51
  52         ~LockChecker()
  53         {
  54                 assert(thr_is_current_thread(*m_owning_thread));
  55                 assert(*m_lock_recursion_counter > 0);
  56
  57                 (*m_lock_recursion_counter)--;
  58
  59                 assert(*m_lock_recursion_counter == m_original_level);
  60         }
  61
  62 private:
  63         int *m_lock_recursion_counter;
  64         int m_original_level;
  65         threadid_t *m_owning_thread;
  66 };
  67
  68 #define SCRIPTAPI_LOCK_CHECK           \
  69         LockChecker scriptlock_checker(    \
  70                 &this->m_lock_recursion_count, \
  71                 &this->m_owning_thread)
  72
  73 #else
  74         #define SCRIPTAPI_LOCK_CHECK while(0)
  75 #endif
  76
  77 #define SCRIPTAPI_PRECHECKHEADER                                               \
  78                 MutexAutoLock scriptlock(this->m_luastackmutex);                       \
  79                 SCRIPTAPI_LOCK_CHECK;                                                  \
  80                 realityCheck();                                                        \
  81                 lua_State *L = getStack();                                             \
  82                 assert(lua_checkstack(L, 20));                                         \
  83                 StackUnroller stack_unroller(L);
  84
  85 #endif /* S_INTERNAL_H_ */
  86